Tag: SSL

On Thursday, September 7, 2017, the International TADF Symposium (organized by cynora GmbH) will take place in Frankfurt. It will be a packed one-day event with a tight focus on OLEDs based on thermally activated delayed fluorescence (TADF). The event will bring together leading industry and academia to share new results and discuss upcoming developments. You can find all the details about speakers and program on the events webpage. It is definitely a very good opportunity to get in touch with the people working on this exciting material development.

Over the past three decades, organic light-emitting diodes (OLEDs) have attracted much attention due to their potential applications in displays and lighting. As promising candidates for lighting applications, OLEDs have several advantages compared with established light sources, such as incandescent bulbs, fluorescent tubes or inorganic LEDs: they are flat area emitters offering pleasant diffuse light perception, wide viewing angles, vivid colors, light and thin luminaires, and the possibility to be made transparent or to be processed on flexible substrates by low cost processing. At present, white OLEDs are capable of achieving a lifetime of more than 200 Khrs, the power efficiency of OLEDs has reached over 100 lm/W, and OLED luminaires are now available for domestic use. However, there is still a long way before we reach the goal of making OLED light sources with great lifetime and efficiency at low cost. In view of this, the potentially large market for OLEDs is driving both the academic and industrial community towards the development of new materials and advanced device manufacturing technologies.

We are inviting authors to contribute original research articles with a focus on OLED materials for lighting.

Submission instructions

Before submitting your manuscript, please ensure you have carefully read the Instructions for Authors for Journal of Solid State Lighting. The complete manuscript should be submitted through the Journal of Solid State Lightingsubmission system. To ensure that you submit to the correct thematic series please select the appropriate section in the drop-down menu upon submission. In addition, indicate within your cover letter that you wish your manuscript to be considered as part of the Thematic Series on OLED Materials for Lighting. All submissions will undergo rigorous peer review and accepted articles will be published within the journal as a collection.

Guest Editors

Submissions will also benefit from the usual benefits of open access publication:

• Rapid publication: Online submission, electronic peer review and production make the process of publishing your article simple and efficient
• High visibility and international readership in your field: Open access publication ensures high visibility and maximum exposure for your work – anyone with online access can read your article
• No space constraints: Publishing online means unlimited space for figures, extensive data and video footage
• Authors retain copyright, licensing the article under a Creative Commons license: articles can be freely redistributed and reused as long as the article is correctly attributed

As a member of the program committee, it is my pleasure to announce the Call for Papers for the Solid State and Organic Lighting (SOLED) Conference in Suzhou, China 2015. The deadline for abstract submission is 7 July 2015 12:00 EDT. The SOLED will take place from 02 – 05 November 2015. It will be a great conference, bringing together the key experts in the field. Keynote speakers include Stephen Forrest, University of Michigan, USA and Jung Han, Yale University, USA.

But there is more than just LEDs made from inorganic semiconductors like GaN (an more complex GaN-based ternary alloys), which produces white light when paired with downconversion phosphor materials. LEDs made from organic semiconductors (OLEDs) or quantum dots (QD-LEDs) are alternative, high efficiency device concepts that offer to participate in the transition to an all solid-state light source future. I got a chance to comment on both technologies in the above mentioned Nature Materials focus (Complementary LED technologies). With respect to all major LED technologies (LED, OLED, and QD-LED), if there is one thing that I wish we will see in future is the coexistence of all different concepts, where each application is further advanced by the most suitable architecture.

The US Department of Energy is supporting R&D efforts to realize solid state lighting (SSL) using both LEDs and OLEDs through their DOE SSL R&D program: the Multi-Year Program Plan. Now DOE recently published to separate videos with experts’ views on the matter. I always find it very beneficial to have the both technologies – LEDs and OLEDs – very close together – be it in DOE workshops or now in this digital format – because it allows to interact directly between the different technology camps. In the end, both system have in common that their are high efficiency, environmentally friendly concepts that should find highest market acceptance/share at the earliest possible time.

The above mentioned paper has finally shaped to its final form. White organic light-emitting diodes: Status and perspective has been published today in Reviews of Modern Physics (RMP). It contains more than 40 pages of densely packed details on white OLEDs including the main concepts of realizing white emission (from both polymers and/or small molecules), in depth discussions of respective efficiency limits, and promising strategies for enhanced light outcoupling. Here is an editorial summary (source RMP):

The conversion of electricity into a photon flux with color quality resembling natural sunlight is desirable for artificial illumination. The ubiquitous incandescent light bulb, introduced in 1880 by Thomas Edison, satisfies this color quality requirement but suffers from a rather poor energy conversion efficiency of approximately 5%. This review focuses on device strategies to produce efficient organic white light-emitting diodes based on small molecular and polymeric semiconductors, which in the context of next generation lighting have a considerable technological promise.

If you like it, please spread the word. Here is an exciting side note: This paper is published in the same issue of RMP that also contains the great Nobel lectures of Serge Haroche and David J. Wineland, who share the 2012 Nobel Prize for Physics. Another good reason to check out the current issue of RMP.